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PES SS 1 Chemistry 3rd Term Exam 2024-2025
  • 1. What type of reaction does the following equation represent? H3O+ OH- --> 2H2O
A) oxidation
B) reduction
C) neutralisation
D) hydrolysis
Chemistry
  • 2. The oxidation number of Y the formula above is ____
A) +7
B) +6
C) -6
D) -7
  • 3. Which statement best describes the process of reduction?
A) removal of electrons
B) addition of hydrogen
C) increase in oxidation number
D) addition of oxygen
Chemistry
  • 4. The oxidation number of Z the formula above is ____
A) -4
B) +4
C) +2
D) -2
  • 5. What is the oxidation number of Manganese in KMnO4?
A) -7
B) +7
C) -6
D) +6
  • 6. Name this compound. KMnO4
A) Potassium tetraoxomanganate (V)
B) Potassium tetraoxomanganate (VII)
C) Potassium hexaoxomanganate (VI)
D) Potassium hexaoxomanganate (IV)
  • 7. What is the oxidation number of Chromium in K2Cr2O7?
A) +7
B) +6
C) -6
D) -7
  • 8. What is the oxidation number of S in SO4-2?
A) +8
B) +6
C) -6
D) -8
  • 9. Which of the following is not a transition metal?
A) Cu
B) Ag
C) Na
D) Fe
  • 10. Which of the following is not an alkali metal?
A) K
B) Na
C) Mg
D) Li
  • 11. What is the chemical formula of Sodium chloride?
A) SCl2
B) NaCl
C) SCl
D) Na2Cl
  • 12. Which of the following indicates oxidation?
A) Removal of electrons
B) Addition of electrons
C) Removal of Oxygen
D) Addition of hydrogen
  • 13. Which of the following does not indicate reduction?
A) Addition of hydrogen
B) Removal of electrons
C) Removal of Oxygen
D) Addition of electrons
Chemistry
  • 14. What does x represent?
A) -1
B) +5
C) -3
D) +3
  • 15. What type of reaction is represented here? AB +CD --> AD + CB
A) Thermal dissociation
B) Displacement
C) Catalytic
D) Double decomposition
  • 16. What is the name of this compound? HNO3
A) Trioxonitrate (VI) acid
B) Trioxonitrate (IV) acid
C) Trioxonitrate (III) acid
D) Trioxonitrate (V) acid
  • 17. Neutralization is the reaction between ________ and ___________
A) an acid and a base
B) a base and a salt
C) an acid and a salt
D) a salt and water
  • 18. Ammonium Chloride is written as __________
A) NH4Cl
B) (NH4)_2Cl2
C) NH4Cl2
D) (NH4)_2Cl
  • 19. Which element has the atomic number 7?
A) Nitrogen
B) Carbon
C) Fluorine
D) Oxygen
  • 20. Which of the following is the correct way to write Aluminium trioxocarbonate (IV)?
A) Al3(CO3)_2
B) Al(CO3)_3
C) Al2(CO3)_3
D) Al(CO3)
  • 21. At constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin. This is the statement of _________
A) Avogadro's Law
B) Charles' Law
C) Gay-Lusaac's Law
D) Boyle's Law
  • 22. What are amphoteric oxides?
A) Non-metallic oxides that exhibit both acidic and basic properties
B) Metallic oxides that exhibit both acidic and basic properties
C) Metallic oxides that exhibit both physical and chemical properties
D) Non-metallic oxides that exhibit both physical and chemical properties
  • 23. Which of the following is the correct way to write Potassium trioxonitrate (V)?
A) KNO3
B) K2NO3
C) K2(NO3)_3
D) K(NO3)_2
  • 24. Which of the following is not an alkaline earth metal?
A) Mg
B) Na
C) Ca
D) Be
Chemistry
  • 25. Which of the following is oxidation?
A) c
B) b
C) d
D) a
Chemistry
  • 26. Which of the following is reduction?
A) c
B) b
C) d
D) a
Chemistry
  • 27. The reaction shown here is an example of ____________
A) Combination
B) Decomposition
C) Thermal dissociation
D) Displacement
Chemistry
  • 28. The reaction shown here is an example of ____________
A) Combination
B) Decomposition
C) Displacement
D) Catalytic
  • 29. The chemical symbol of Sodium is ___
  • 30. The chemical symbol of Potassium is ___
  • 31. The chemical symbol of Magnesium is ___
  • 32. The chemical symbol of Nitrogen is ___
  • 33. The chemical symbol of Copper is ___
  • 34. The chemical symbol of Manganese is ___
  • 35. The chemical symbol of Iron is ___
  • 36. The existence in the same physical state of two or more structural forms of the same element is known as ____
A) isotopy
B) eclipse
C) allotropy
D) hybridization
  • 37. Which groups are known as halogens?
A) group 9
B) group 8
C) group 5
D) group 7
  • 38. Calculate the molar mass of Potassium chloride (k=39, Cl=35.5)
A) 58.5gmol-1
B) 47gmol-1
C) 74.5gmol-1
D) 74gmol-1
  • 39. _____is a process of preventing iron from rusting by protecting it with other metals like copper, tin, gold and silver
A) Greasing
B) Electroplating
C) Painting
D) Oiling
  • 40. The symbol of silver is written as
A) Al
B) Ag
C) Au
D) Si
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